Update more cookbooks

cookbooks/chef_client_updater/resources/updater.rb

@@ -26,9 +26,11 @@ property :version, [String, Symbol], default: :latest
 property :post_install_action, String, default: 'exec'
 property :exec_command, String, default: $PROGRAM_NAME.split(' ').first
 property :exec_args, Array, default: ARGV
+property :download_url_override, String
+property :checksum, String
 
 action :update do
-  if update_necessary? # ~FC023
+  if update_necessary?
     converge_by "Upgraded chef-client #{current_version} to #{desired_version}" do
       upgrade_command = Mixlib::ShellOut.new(mixlib_install.install_command)
       upgrade_command.run_command
@@ -37,12 +39,14 @@ action :update do
   end
 end
 
-action_class.class_eval do
+action_class do
   def load_mixlib_install
+    gem 'mixlib-install', '~> 3.2', '>= 3.2.1'
     require 'mixlib/install'
   rescue LoadError
     Chef::Log.info('mixlib-install gem not found. Installing now')
     chef_gem 'mixlib-install' do
+      version '>= 3.2.1'
       compile_time true if respond_to?(:compile_time)
     end
 
@@ -69,6 +73,9 @@ action_class.class_eval do
       product_version: new_resource.version == 'latest' ? :latest : new_resource.version,
 
     }
+    if new_resource.download_url_override && new_resource.checksum
+      options[:install_command_options] = { download_url_override: new_resource.download_url_override, checksum: new_resource.checksum }
+    end
     Mixlib::Install.new(options)
   end
 
@@ -80,7 +87,7 @@ action_class.class_eval do
   end
 
   def desired_version
-    new_resource.version == 'latest' ? mixlib_install.available_versions.last : new_resource.version
+    new_resource.version.to_sym == :latest ? mixlib_install.available_versions.last : new_resource.version
   end
 
   # why wouldn't we use the built in update_available? method in mixlib-install?
@@ -90,6 +97,7 @@ action_class.class_eval do
     load_mixlib_versioning
     cur_version = Mixlib::Versioning.parse(current_version)
     des_version = Mixlib::Versioning.parse(desired_version)
+    Chef::Log.debug("The current chef-client version is #{cur_version} and the desired version is #{desired_version}")
     new_resource.prevent_downgrade ? (des_version > cur_version) : (des_version != cur_version)
   end